The interquartile range is the difference between the third quartile (Q3) and the first quartile (Q1). If you need a refresher on quartiles, you can take a look at our lesson.
For now, all you need to know is that the first quartile is the value that separates the first 25% of the data from the remaining 75%.
The third quartile is the opposite — it separates the first 75% of the data from the remaining 25%.
The interquartile range is the difference between these two values.
Instructions
We’ve calculated the first quartile of songs
and stored it in the variable q1
.
Calculate the third quartile and store it in a variable named q3
.
To calculate the third quartile, call the same function, but change the second parameter to 0.75
.
Now that we have both the first quartile and the third quartile, let’s calculate the IQR.
Create a variable named interquartile_range
and set it equal to the difference between q3
and q1
.